The Sukhoi Su-25 is a Soviet single-seat, twin-engine close air support jet. The first prototype made its maiden flight on 22 February 1975. NATO assigned the aircraft the name "Frogfoot". Russian pilots nicknamed it "Grach" ("Rook"). The pilot sits low in the cockpit, protected by an armoured bathtub assembly which makes for a cramped cockpit. Visibility is also limited, a trade-off for improved pilot protection. Rearwards visibility is very limited, compensated by a periscope.